package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.GlobalExceptionHandler;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.ShoppingCart;
import com.itheima.reggie.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

/**
 * @author xindezhentu
 * @create 2023-04-12 11:06  购物车
 */
@RestController
@RequestMapping("/shoppingCart")
@Slf4j
public class ShoppingCartController {

    @Autowired
    private ShoppingCartService shoppingCartService;

    /**
     * 添加购物车
     * @param shoppingCart
     * @return
     */
    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart){
      log.info("购物车数据：{}",shoppingCart);
//      设置用户id,指定当前是哪个用户的购物车数据
        Long currentID = BaseContext.getCurrentID();
        shoppingCart.setUserId(currentID);
//        查询当前菜品或者套餐是否在购物车中
        Long dishId = shoppingCart.getDishId();
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,currentID);
        if(dishId!=null){
//            添加到购物车的是菜品
            queryWrapper.eq(ShoppingCart::getDishId,dishId);

        }else {
//            添加到购物车的是菜单
            queryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
        }
        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);
        if(cartServiceOne!=null){
            //        如果已经存在，就在原来数量基础上加一
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number+1);
            shoppingCartService.updateById(cartServiceOne);
        }else {
            //        如果不存在，则添加到购物车，数量默认为1
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
            cartServiceOne=shoppingCart;
        }





        return R.success(cartServiceOne);
    }

    /**
     * 购物车展示
     * @return
     */
    @GetMapping("/list")
    public R<List<ShoppingCart>>list (){

        LambdaQueryWrapper<ShoppingCart>queryWrapper =new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentID());
        queryWrapper.orderByAsc(ShoppingCart::getCreateTime);

        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);
        return R.success(list);

    }

    /**
     * 清空购物车
     * @return
     */
    @DeleteMapping("/clean")
    public R<String> clean(){
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentID());

        shoppingCartService.remove(queryWrapper);
        return R.success("清空购物车成功");
    }
    /**
     * 添加购物车
     * @param shoppingCart
     * @return
     */
    @PostMapping("/sub")
    public R<ShoppingCart> sub(@RequestBody ShoppingCart shoppingCart){
        log.info("购物车数据：{}",shoppingCart);
//      设置用户id,指定当前是哪个用户的购物车数据
        Long currentID = BaseContext.getCurrentID();
        shoppingCart.setUserId(currentID);

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,currentID);
        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);


            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number-1);
            if(number==1){
                shoppingCartService.removeById(cartServiceOne.getId());
            }
            shoppingCartService.updateById(cartServiceOne);





        return R.success(cartServiceOne);
    }
}
